Features & Benefits Introducing the most advanced, lightweight cup ever. The AirCore Hard Cup is combined of patented 3-layer fusion technology. The outer most layers consists of a compressed foam and fabric shell offering the highest level of comfort. The inner core is a composite co-polymer material for protection. The AirCore hard cup is an easy substitute for the traditional hard cup and is ideal for Baseball, Hockey, Lacrosse and MMA athletes. Lightweight Rigid Co-polymer Core Comfortable and Easy to Fit Machine Washable